AP: Avoid 20/40 MHz co-ex scan if PRI/SEC switch is not allowed

When an AP is started on the 5.2 GHz band with 40 MHz bandwidth, a
scan is issued in order to handle 20/40 MHz coexistence. However,
the scan is issued even if iface->conf->no_pri_sec_switch is set,
which is redundant.

Fix this by checking iface->conf->no_pri_sec_switch before starting
the scan.

Signed-off-by: Alexander Bondar <alexander.bondar@intel.com>

src/ap/hw_features.c

@@ -472,8 +472,9 @@ static int ieee80211n_check_40mhz(struct hostapd_iface *iface)
 	struct wpa_driver_scan_params params;
 	int ret;
 
-	if (!iface->conf->secondary_channel)
-		return 0; /* HT40 not used */
+	/* Check that HT40 is used and PRI / SEC switch is allowed */
+	if (!iface->conf->secondary_channel || iface->conf->no_pri_sec_switch)
+		return 0;
 
 	hostapd_set_state(iface, HAPD_IFACE_HT_SCAN);
 	wpa_printf(MSG_DEBUG, "Scan for neighboring BSSes prior to enabling "